<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>DOM</title>
  <script>
    var dl = document.getElementById('app');
  </script>
</head>
<body>

<dl id="app">
  <dt>java</dt>
  <dd>javaSE</dd>
  <dd>javaWeb</dd>
  <dd>javaEE</dd>
</dl>

</body>
</html>